-- jumptag - Jump to any function, class or heading with F4. Go, Python, C...
-- Copyright 2020-2022 Tero Karvinen http://TeroKarvinen.com
-- https://github.com/terokarvinen/micro-jump
-- MIT license

local config = import("micro/config")
local shell = import("micro/shell")
local micro = import("micro")
local buffer = import("micro/buffer")

function init()
	config.MakeCommand("jumptag", jumptagCommand, config.NoComplete)
	config.TryBindKey("F4", "command:jumptag", true)
	config.AddRuntimeFile("jump", config.RTHelp, "help/jump.md")
end

function extractDetails(line)
	local firstWord = line:match("^%S+")
	local filePath = line:match("\t(.-)\t")
	local lineNumber = line:match("line:(%d+)")
	return firstWord, filePath, lineNumber
end

function jumptagCommand(bp) -- bp BufPane
		local filename = bp.Buf.Path
		-- local cmd = string.format("bash -c \"ctags -f - --sort=no --fields=n '%s'|fzf --layout=reverse|tr ':' '\n'|tail -1\"", filename)
		local cmd = string.format("bash -c \"git ls-files | ctags --quiet=yes -L - -f - --fields=n | fzf --layout=reverse \"")
		local out = shell.RunInteractiveShell(cmd, false, true)
		local firstWord, filePath, lineNumber = extractDetails(out)
		if filePath ~= nil and firstWord ~= "" then
			local buf, err = buffer.NewBufferFromFile(filePath)
			if err == nil then
				bp:OpenBuffer(buf)
			end
		else
			micro.InfoBar():Message("Jump cancelled.")
			return
		end
		local linenum = tonumber(lineNumber)-1
		bp.Cursor.Y = linenum
		micro.InfoBar():Message(string.format("Jumped to %s on line %s in file %s", firstWord, lineNumber, filePath))
end